Calculate with the formula for projectile motion

A helicopter flying with horizontal speed of 2.0 m/s drops a rescue package that falls on the ground 16.0 m away from the initial dropping point. How high is the helicopter flying? 2. A small stone is dropped with zero initial velocity from the top of a building and falls to the ground in 2.0 s. How tall is the building? 3. A person standing on a 180.0 m high bridge kicks a bolt horizontally off its edge that falls to the ground 18.0 m away from the edge. What is the initial speed of the bolt